<template>
  <view>
    <!-- 搜索框 -->
	<view class="search-box">
		<uni-search-bar @input="input" :radius="100" cancelButton= 'none'></uni-search-bar>
	</view>
  <!-- 搜索列表 -->
  <view class="search-list" v-if="searchResults.length !== 0">
    <view class="search-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item.goods_id)">
      <view class="goods-name">{{item.goods_name}}</view>
      <uni-icons type="arrowright" size="16"></uni-icons>
    </view>
  </view>
  <!-- 搜索历史展示区 -->
  <view class="history-box" v-else>
    <!-- 头部 -->
    <view class="history-title">
      <text>搜索历史</text>
      <uni-icons type="trash" size="17" @click="cleanHistorys"></uni-icons>
    </view>
    <!-- 列表区域 -->
    <view class="history-list">
      <uni-tag :text="item1"  v-for="(item1, i1) in histories" :key="i1"></uni-tag>
    </view>
  </view>
  </view>
</template>

<script>
	export default {
		data() {
			return {
				//延时器timerid
        timer: null,
        //存储搜索关键字
        ky: '',
        searchResults:[],
        //搜索历史列表
        historyList:['a','apple','app','ios']
			};
		},
    onLoad() {
      this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
    },
    methods:{
      input(e){
        clearTimeout(this.timer)
        this.timer = setTimeout(()=>{
          this.kw = e.value
          // console.log(this.kw)
          this.getsearchResults()
        },500)
      },
      async getsearchResults(){
        if(this.kw === ''){
          this.searchResults = []
          return
        }
       const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query: this.kw})
       if(res.meta.status !== 200) return uni.$showMsg()
       this.searchResults = res.message
       
       //保存搜索历史记录
       this.saveSearchHistory()
      },
      gotoDetail(goods_id){
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id='+goods_id
        })
      },
      saveSearchHistory(){
        //new Set对象
        const set = new Set(this.historyList)
        set.delete(this.kw)
        
        set.add(this.kw)
        
        this.historyList = Array.from(set)
        // this.historyList.push(this.kw)
        
        //保存到本地
        uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      
      //清空搜索记录
      cleanHistorys(){
        this.historyList = []
        uni.setStorageSync('kw','[]')
      }
    },
    
    computed:{
      histories(){
        return [...this.historyList].reverse()
      }
    }
	}
</script>

<style lang="scss">
  .search-box {
    position: sticky;
    top: 0;
    z-index: 999;
  }
  
  .search-list {
    padding: 0 5px;
    .search-item {
      display: flex;
      font-size: 15px;
      padding: 13px 0;
      border-bottom: 1px solid #efefef;
      align-items: center;
      justify-content: space-between;
      .goods-name {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        margin-right: 3px;
      }
    }
  }
  
  .history-box {
    padding: 0 5px;
    .history-title {
      display: flex;
      align-items: center;
      font-size: 15px;
      height: 40px;
      border-bottom: 1px solid #efefef;
      justify-content: space-between;
    }
    .history-list {
      display: flex;
      flex-wrap: wrap;
      .uni-tag {
         margin-top: 5px;
         margin-right: 5px;
       }
    }
  }
</style>
